{"id":838,"date":"2004-12-02T15:43:00","date_gmt":"2004-12-02T14:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/spaceplanes\/"},"modified":"2026-10-08T00:32:50","modified_gmt":"2026-10-07T22:32:50","slug":"spaceplanes","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/spaceplanes\/","title":{"rendered":"Rumfly"},"content":{"rendered":"
\n

Der findes forskellige m\u00e5der at opsende og flyve genanvendelige rumfart\u00f8jer p\u00e5.<\/p>\n

Rumf\u00e6rgen bruger sine egne motorer sammen med to kraftige fastbr\u00e6ndstofsraketboostere til at lette. Dette kaldes undertiden \u2018single stage to orbit\u2019.<\/p>\n<\/div>\n

Et problem ved rumfart\u00f8jer af typen Space Shuttle er den ekstra v\u00e6gt, som br\u00e6ndstof og raketmotorer medf\u00f8rer. Alligevel er Shuttle n\u00f8dt til at vende tilbage til Jorden som et sv\u00e6vefly. Den har ingen jetmotorer og kan derfor ikke flyve rundt for at g\u00f8re et nyt fors\u00f8g, hvis den rammer ved siden af landingsbanen.<\/p>\n

En m\u00e5de at g\u00f8re rumfart\u00f8jet mindre p\u00e5 er at lade det k\u00f8re med p\u00e5 ryggen en del af vejen. Et stort fly kan for eksempel transportere et rumfly op til en h\u00f8jde p\u00e5 10 km. N\u00e5r det befinder sig over det meste af atmosf\u00e6ren, slippes rumflyet fri.<\/p>\n

Det er ogs\u00e5 muligt at bruge en raket til at opsende et genanvendeligt rumfart\u00f8j. I begyndelsen af 1990\u2019erne unders\u00f8gte ESA muligheden for at opsende et lille rumfly ved navn Hermes p\u00e5 toppen af Ariane-5-raketten.<\/p>\n

En anden m\u00e5de at spare p\u00e5 v\u00e6gten p\u00e5 kunne v\u00e6re at anvende en ny generation af motorer, der udnytter luften i vores atmosf\u00e6re i den f\u00f8rste del af opstigningen. F\u00f8rst n\u00e5r fart\u00f8jet n\u00e5r ud i det ydre rum, ville det skifte til raketdrift ved hj\u00e6lp af ilten om bord. Der er dog stadig mange \u00e5r til, at s\u00e5danne motorer bliver en realitet.<\/p>","protected":false},"excerpt":{"rendered":"

There are various ways to launch and fly reusable spacecraft. The Space Shuttle uses its own engines, together with two powerful solid rocket boosters, to get off the ground. This […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2004\/12\/future_launchers5\/18249547-2-eng-GB\/Future_launchers.jpg","esa_banner_description":"","esa_banner_credit":"ESA-C. VIJOUX","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/Future_launchers5","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,41,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-838","post","type-post","status-publish","format-standard","hentry","category-learn","category-rockets-technology","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=838"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/838\/revisions"}],"predecessor-version":[{"id":1981,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/838\/revisions\/1981"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=838"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=838"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=838"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=838"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=838"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=838"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=838"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}